Tales of Maj'Eyjal(TOME), a particularly well-developed roguelike that started life many years ago as an angband variant, is introduced on steam now at a discount. Great variety of races and classes and more fleshed out than most roguelikes. I've been playing new versions every few years and it's an excellent time-waster with some new twists on the roguelike formula.
News link to homepage: http://te4.org/blogs/darkgod/2013/12…vailable-steam.